Drill-head for channeling-machines



(No Model.)

W. L. SAUNDERS.

DRILL HEAD FOR GHANNELING MACHINES. No. 311,378.

Patented Jan. 2'7, 1885.

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\VILLIAM Ll SAUNDERS, OF JERSEY CITY, NEW JERSEY.

DRILL-HEAD FOR CHANNELlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 311.378, dated January 27, 1885.

Application filed November 17, 1854.

To all whom it may concern:

Beit known that I, WILLIAM L. SAUNDERS, a citizen of the United States, residing at J ersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Drill-Heads for Channeling-Machines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to the class of machinery used in channeling stone, where an open cut or channel is made by the intermittent blows of a gang of drills mounted upon a car and fed in the direction of the cut.

It consists in an improved means for looking the gang of drills more firmly and securely in their clamp, which is permanently secured to the reciprocating cross-head, and in the combination and arrangement of parts, as hereinaftcr more fully described, claimed, and illustrated in the accompanying drawings, forming part of this specification.

In machines of this class now in use considerable difficulty has been experienced in securing the drills to the crosshead, the blows of the engine serving to dislodge and disarrange them, and it is not an unfrequent occurrence for them to be entirely displaced. It is also, now, a matter requiring considerable time and consequent stoppage of the machinery to renew the drills in such a gang for sharpening or other purposes; but by means of the present invention a gang can be locked in place by one blow of a hammer.

The manner of fastening in my improved device is such that various lengths of drills can be locked in the same head, and it is also capable of holding a gang of drills set in progressive series, so that their cutting-edges shall form a line oblique to the direction of reciprocation. This oblique setting of the drills is necessary in doing transverse or sidehill cutting where the engine and drills are set at an angle, the points remaining on a line parallel with the track.

In machines where a gang of drills is employed it is usual to hold the drills by two clamps, one being an upper clamp with serrations to correspond with serrations on the face of the'drills.- This clamp serves to maintain the points in a fixed position with reference to each other. The other catches the (No model 1 body of the drills and gives the gang the reciprocating motion. Another form of clamp is where the tops of the drills abut against a shoulder in the clamp, thus necessitating drills of equal length. By my device the upper clamp, with its serrated drills, is done away with, and I accomplish the binding of the drills together by the powerful edge-pressure imparted through the key. I can also use drills of varied lengths. It is obvious that the harder the blow driven by the machine, the tighter the drills get in the clamp.

I attain the several ends in view by means of mechanism illustrated in the drawings hereto attached, in which- Figure 1 is an elevation of the head, with a gang of drills clamped therein. Fig. 2 is a similar view showing the drills adjusted to angular cutting. Fig. 3 is a plan view of Fig. 1. Fig. 4 is a section on the line 4 4 of Fig. 3, with the drills removed. Fig. v5 is a side elevation showing the head and drills connected to the machine. p

The same reference-letters have been applied to similar parts throughout the several figures.

In the drawings, A' represents a gang of dri1ls,placed side by side, and clamped in the head B. This head is locked to the pistonhead P by means of bolts (Mn connection with the lip or shoulder L on said head B, which lip extends a short distance beneath the piston-head P and receives part of the shock, thereby lessening the strain upon the bolts Q.

The manner of clamping the gang of drills in the head is as follows: In the rear face of the head is a depression of any desired width, and of a depth slightly less than the thickness of the drills. One edge of this depression, 1 2,is cut obliquely, and the other edge, 5 6, ob liquely, also, but on twice the angle of the first. The outside drills of every gang have one beveled face on the same angle as the edge 1 2. It will thus be seen that when the gang is placed in position one outside drill, being beveled as described, rests squarely against the oblique edge 1 2, but the other presents a face, 3 4, not parallel with its corresponding edge, 5 6. Into the angular space thus formed I drive the wedge WV, which is of a thickness equal to the difference between the angles of the oblique surfaces 3 4 and 5 6. WVhen it is desired to make up the gang of a smaller number of drills,I substitute for the wedge W another and similar one, the body of which is larger,but the angles of the side of which are still the same.

In Fig. 2 I haveshown the manner of locking the drills when adjusted to angular cutting. In this event the wedge is slipped farther up or down conversely with the direction its adjacent drill may be moved in order to give the desired angle to the cutting-edges of the gang.

My device is simple and inexpensive in construction and effective in operation, locking the drills firmly in a position opposed to the blows of the piston, which thus tends to hold them in position and prevent their displacement. They are thus rendered capable of speedy and perfect adjustment to any angle of cut.

It is obvious that its use necessitates the employment of two drills ineach gang with one beveled face each, but otherwise the ordinary fiat drill as now employed for channeling may be used, and their length is a matter of no con sequence within certain limits, as a gang may be composed of the desired number of drills, all of different lengths.

I claim as my invention 1. In a reciprocating drill, thehead B, having drill-receiving depression or recess in the side thereof, said recess being formed with a longitudinal plane surface, against which the drills rest, and beveled ends between which the said drills are secured, in combination with one or more drills having beveled outer faces and the removable wedge IV, as described.

2. In a reciprocating drill, a head having drill-receiving recess or depression terminating in differentiallybeveled ends, in combination with one or more drills, A, and the removable wedge W, as described.

3. In a reciprocating drill, the head B, having drill-receiving depression with differentially-beveled ends formed with the lip L, in combination with one or more drills, A, having beveled outer faces, and the wedge IV, as described.

In testimony whereof I- affix my signature in presence of two witnesses.

WILLIAM L. S AUNDERS.

Witnesses:

F. M. PIERCE, EDGAR INGRAHAM. 

